Question 1

Which of the following ratios is the maximum overdrive between the pulleys of a variable-diameter pulley (VDP) transmission?

Accepted Answer

A)  1:01 
B)  1:02 
C)  2:01 
D)  0.2:1 
A)  1:01 
B)  1:02 
C)  2:01 
D)  0.2:1

Question 2

Technician A says most manufacturers use a multi-disc clutch pack and a set of planetary gears to allow the continuously variable transmission (CVT) to operate in reverse. Technician B says Ford Motor Company uses these planetary gear sets to create a two-speed CVT. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 3

Technician A says that Variable Diameter Pulley (VDP) Continuously Variable Transmissions (CVT) are commonly rebuilt. Technician B says that VDP CVT's require more frequent fluid changes than a conventional automatic transmission. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 4

Technician A says the toroidal continuously variable transmission (CVT) is limited in production because of high manufacturing cost. Technician B says the toroidal, or roller, design uses two curved discs, an input disc and an output disc. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 5

Technician A says the toroidal continuously variable transmission (CVT) can have a high gear ratio of approximately 4:1 to begin accelerating the vehicle. Technician B says when the rollers in a toroidal CVT are perpendicular to the input and output disc, the gear ratio is 1:1. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 6

Technician A says continuous variable transmissions may use two variable diameter pulleys rather than gears to change ratio. Technician B says a hybrid vehicle may use a parallel hybrid transmission, in which either the engine or an electric motor can power the transmission. Which technician is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 7

In a Continuously Variable Transmission (CVT), what changes in a smooth step-less progression to suit speed and load conditions.

Accepted Answer

A)  Gear ratios 
B)  Torque converter clutch operation 
C)  Travel direction 
D)  None of the above 
A)  Gear ratios 
B)  Torque converter clutch operation 
C)  Travel direction 
D)  None of the above

Question 8

Technician A says the longitudinal steel bands in a variable pulley diameter style continuously variable transmission (CVT) are used to hold the belt together and keep the steel plates lined up. Technician B says these bands hold the plates apart so there is a large gap maintained between each plate. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 9

Technician A says most manufacturers recommend repairing internal components of a continuously variable transmission (CVT). Technician B says specialty tools are required to compress the output pulley and reinstall the belt on most CVTs. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 10

All of the following statements are true with respect to belt service except:

Accepted Answer

A)  Belts need to be replaced if there are any signs of wear on them. 
B)  Transmission can compensate for a small amount of wear in its normal programming. 
C)  Replacement of the belt is direction oriented. 
D)  Replace only the individual component that has been damaged in the belt. 
A)  Belts need to be replaced if there are any signs of wear on them. 
B)  Transmission can compensate for a small amount of wear in its normal programming. 
C)  Replacement of the belt is direction oriented. 
D)  Replace only the individual component that has been damaged in the belt.

Question 11

Technician A says that a typical CVT belt can cost up to $750. Technician B says that when disassembling a sheave, if the fluid is badly contaminated, the entire variator assembly should be rebuilt. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician 
A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician

Question 12

Technician A says typically, a variable-diameter pulley (VDP) gear ratio is 3:1 through the pulleys from a dead stop. Technician B says as the vehicle gains speed, the input pulley diameter increases, while the output pulley diameter decreases. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 13

Technician A says a variable-diameter pulley (VDP) system operates using two variable diameter pulleys with either a steel or a rubber belt between them. Technician B says the rubber belt has a limited service life in an automobile, so most manufacturers use them. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 14

Technician A says the toroidal continuously variable transmission (CVT) is limited in production because of high manufacturing cost. Technician B says the toroidal, or roller, design uses four curved discs - two input discs and two output discs. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 15

A special output spring compressor should be used to compress the sheave and spring completely when replacing a CVT belt.

Accepted Answer

A) True 
 B)False

Question 16

Technician A says most manufacturers use a limited number of multi-disc clutch packs and a set of planetary gears to allow the continuously variable transmission (CVT) to operate in reverse. Technician B says some hybrid transmissions use planetary gear sets to create a two-speed CVT. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 17

Which of these is not used in a continuously variable transmission (CVT)?

Accepted Answer

A)  Steel belt 
B)  Rubber belt 
C)  Nylon belt 
D)  None of the above 
A)  Steel belt 
B)  Rubber belt 
C)  Nylon belt 
D)  None of the above

Question 18

Technician A says most manufacturers use a limited number of multi-disc clutch packs and a set of planetary gears to allow the continuously variable transmission (CVT) to operate in reverse. Technician B says some hybrid transmissions use planetary gear sets to create a two-speed CVT. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A 
B)  Technician B 
C)  Both A and B 
D)  Neither A nor B

Question 19

Technician A says that a traditional transmission can operate at pressures that can be tested with a normal transmission pressure gauge. Technician B says that a CVT transmission needs a pressure transducer and a DSO to view pressures. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician 
A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician

Question 20

Choose the correct statement with respect to a toroidal CVT.

Accepted Answer

A)  It is cheap to manufacture. 
B)  It can handle larger amounts of torque. 
C)  Its design uses two curved discs-an input disc and an output disc. 
D)  A universal transmission fluid is best suited for this CVT. 
A)  It is cheap to manufacture. 
B)  It can handle larger amounts of torque. 
C)  Its design uses two curved discs-an input disc and an output disc. 
D)  A universal transmission fluid is best suited for this CVT.

Exam 21: Continuously Variable Transmissions

Which of the following ratios is the maximum overdrive between the pulleys of a variable-diameter pulley (VDP) transmission?

Technician A says most manufacturers use a multi-disc clutch pack and a set of planetary gears to allow the continuously variable transmission (CVT) to operate in reverse. Technician B says Ford Motor Company uses these planetary gear sets to create a two-speed CVT. Who is correct?

Technician A says that Variable Diameter Pulley (VDP) Continuously Variable Transmissions (CVT) are commonly rebuilt. Technician B says that VDP CVT's require more frequent fluid changes than a conventional automatic transmission. Who is correct?

Technician A says the toroidal continuously variable transmission (CVT) is limited in production because of high manufacturing cost. Technician B says the toroidal, or roller, design uses two curved discs, an input disc and an output disc. Who is correct?

Technician A says the toroidal continuously variable transmission (CVT) can have a high gear ratio of approximately 4:1 to begin accelerating the vehicle. Technician B says when the rollers in a toroidal CVT are perpendicular to the input and output disc, the gear ratio is 1:1. Who is correct?

In a Continuously Variable Transmission (CVT), what changes in a smooth step-less progression to suit speed and load conditions.

Technician A says most manufacturers recommend repairing internal components of a continuously variable transmission (CVT). Technician B says specialty tools are required to compress the output pulley and reinstall the belt on most CVTs. Who is correct?

All of the following statements are true with respect to belt service except:

Technician A says that a typical CVT belt can cost up to $750. Technician B says that when disassembling a sheave, if the fluid is badly contaminated, the entire variator assembly should be rebuilt. Who is correct?

Technician A says typically, a variable-diameter pulley (VDP) gear ratio is 3:1 through the pulleys from a dead stop. Technician B says as the vehicle gains speed, the input pulley diameter increases, while the output pulley diameter decreases. Who is correct?

Technician A says a variable-diameter pulley (VDP) system operates using two variable diameter pulleys with either a steel or a rubber belt between them. Technician B says the rubber belt has a limited service life in an automobile, so most manufacturers use them. Who is correct?

Technician A says the toroidal continuously variable transmission (CVT) is limited in production because of high manufacturing cost. Technician B says the toroidal, or roller, design uses four curved discs - two input discs and two output discs. Who is correct?

A special output spring compressor should be used to compress the sheave and spring completely when replacing a CVT belt.

Which of these is not used in a continuously variable transmission (CVT)?

Technician A says that a traditional transmission can operate at pressures that can be tested with a normal transmission pressure gauge. Technician B says that a CVT transmission needs a pressure transducer and a DSO to view pressures. Who is correct?

Choose the correct statement with respect to a toroidal CVT.

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